← single night · whole-night plan
Which nights are best for a target over the coming weeks. The astronomy mark (darkness × altitude × Moon) is computed for every night; the weather and the overall mark exist only where Open-Meteo has a forecast (the next four days) or ERA5 history (past nights) — the rest is honestly blank.
| night of | astronomy | weather | overall | best window | highest | dark h | Moon | Moon sep. |
|---|---|---|---|---|---|---|---|---|
| 2027-02-28 Sun | 21 | — | unknown | 04:40–05:25 (good, 0.75 h) | 87.3° 10:45 | 9.7 | 43% | 89.3° |
| 2027-03-01 Mon | 23 | — | unknown | 04:35–05:25 (good, 0.83 h) | 87.3° 10:40 | 9.66 | 34% | 82.6° |
| 2027-03-02 Tue | 25 | — | unknown | 04:25–05:25 (good, 1.0 h) | 87.3° 10:35 | 9.61 | 25% | 76.1° |
| 2027-03-03 Wed | 27 | — | unknown | 04:20–05:20 (good, 1.0 h) | 87.3° 10:35 | 9.57 | 18% | 70.1° |
| 2027-03-04 Thu | 30 | — | unknown | 04:15–05:20 (good, 1.08 h) | 87.3° 10:30 | 9.52 | 11% | 64.8° |
| 2027-03-05 Fri | 31 | — | unknown | 04:10–05:20 (good, 1.17 h) | 87.3° 10:25 | 9.47 | 6% | 60.3° |
| 2027-03-06 Sat | 31 | — | unknown | 04:05–05:15 (good, 1.17 h) | 87.3° 10:20 | 9.43 | 2% | 57.1° |
| 2027-03-07 Sun | 32 | — | unknown | 04:05–05:15 (good, 1.17 h) | 87.3° 10:20 | 9.38 | 0% | 55.5° |
| 2027-03-08 Mon | 33 | — | unknown | 04:00–05:15 (good, 1.25 h) | 87.3° 10:15 | 9.33 | 0% | 55.8° |
| 2027-03-09 Tue | 33 | — | unknown | 03:55–05:10 (good, 1.25 h) | 87.3° 10:10 | 9.28 | 3% | 57.9° |
| 2027-03-10 Wed | 35 | — | unknown | 03:50–05:10 (good, 1.33 h) | 87.3° 10:05 | 9.23 | 7% | 61.8° |
| 2027-03-11 Thu | 36 | — | unknown | 03:45–05:10 (good, 1.42 h) | 87.3° 10:00 | 9.19 | 13% | 67.2° |
| 2027-03-12 Fri | 35 | — | unknown | 03:45–05:05 (good, 1.33 h) | 87.3° 10:00 | 9.14 | 21% | 73.6° |
| 2027-03-13 Sat | 37 | — | unknown | 03:40–05:05 (good, 1.42 h) | 87.3° 09:55 | 9.09 | 31% | 80.9° |
| 2027-03-14 Sun | 38 | — | unknown | 03:35–05:05 (good, 1.5 h) | 87.3° 09:50 | 9.04 | 42% | 88.7° |
| 2027-03-15 Mon | 38 | — | unknown | 03:30–05:00 (good, 1.5 h) | 87.3° 09:45 | 8.99 | 53% | 96.6° |
| 2027-03-16 Tue | 38 | — | unknown | 03:30–05:00 (good, 1.5 h) | 87.3° 09:40 | 8.94 | 64% | 104.3° |
| 2027-03-17 Wed | 38 | — | unknown | 03:35–05:00 (good, 1.42 h) | 87.3° 09:40 | 8.89 | 75% | 111.5° |
| 2027-03-18 Thu | 38 | — | unknown | 03:30–04:55 (good, 1.42 h) | 87.3° 09:35 | 8.84 | 84% | 117.6° |
| 2027-03-19 Fri | 36 | — | unknown | 03:25–04:55 (good, 1.5 h) | 87.3° 09:30 | 8.79 | 92% | 122.1° |
| 2027-03-20 Sat | 35 | — | unknown | 03:25–04:55 (good, 1.5 h) | 87.3° 09:25 | 8.73 | 97% | 124.4° |
| 2027-03-21 Sun | 34 | — | unknown | 03:20–04:50 (good, 1.5 h) | 87.3° 09:25 | 8.68 | 100% | 124.2° |
| 2027-03-22 Mon | 35 | — | unknown | 03:20–04:50 (good, 1.5 h) | 87.3° 09:20 | 8.63 | 100% | 121.8° |
| 2027-03-23 Tue | 34 | — | unknown | 03:15–04:45 (good, 1.5 h) | 87.3° 09:15 | 8.58 | 97% | 117.5° |
| 2027-03-24 Wed | 34 | — | unknown | 03:15–04:45 (good, 1.5 h) | 87.3° 09:10 | 8.53 | 92% | 111.8° |
| 2027-03-25 Thu | 33 | — | unknown | 03:10–04:45 (good, 1.58 h) | 87.3° 09:05 | 8.47 | 86% | 105.4° |
| 2027-03-26 Fri | 32 | — | unknown | 03:10–04:40 (good, 1.5 h) | 87.3° 09:05 | 8.42 | 78% | 98.5° |
| 2027-03-27 Sat | 33 | — | unknown | 04:05–05:40 (good, 1.58 h) | 87.3° 10:00 | 8.37 | 70% | 91.6° |
| 2027-03-28 Sun | 35 | — | unknown | 03:55–05:40 (good, 1.75 h) | 87.3° 09:55 | 8.31 | 60% | 84.7° |
| 2027-03-29 Mon | 37 | — | unknown | 03:50–05:35 (good, 1.75 h) | 87.3° 09:50 | 8.26 | 51% | 78.1° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2027-02-28&days=30"
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&days=30&format=csv" -o m31-calendar.csvOne row per night: score_astronomy always, score_weather / score only where a forecast or history exists (null otherwise, with weather_source saying which), best window, dark hours, Moon illumination and separation, transit. 7–60 nights. Errors: 400 with invalid_date or target_unresolved. Results are cached for six hours; calculation version 2026-10-10.1.